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Global DNA methylation in blood after 24 h or 7 days of MWCNT exposure. Levels of DNA methylation in the blood of mice after exposure to DM or MWCNT for 24 h or 7 days using the 5-mC assay. Data expressed as mean ± SEM percent methylation. Asterisks indicate significance at *p<0.05 compared to the DM controls. n = 9 in all groups.
